Finding the Fourth Proportional to 148,321, 204,687.30 and 81,257.32

Step by Step Solution

1. Step 1: Write the proportion equation
   148,321 : 204,687.30 = 81,257.32 : x
2. Step 2: Convert to fraction form
   148,321/204,687.30 = 81,257.32/x
3. Step 3: Cross multiply
   148,321x = 204,687.30 × 81,257.32
4. Step 4: Simplify right side
   148,321x = 16,632,341,436.04
5. Step 5: Solve for x
   x = 16,632,341,436.04/148,321
6. Step 6: Final answer
   x = 112,137.47